just spend two days on debugging my code on a customers' HP Elitebook 8560w with AMD FirePro M5950. This GL code worked for ages, on every hardware I came across. It's simple:

Given an interleaved array of positions and texcoords [x0, y0, u0, v0, x1, y1, u1, v1, ...] the following code doesn't work on the Elitebook, if the positions are of type GL_INT and the texcoords are GL_FLOAT: